library-functions.md

description	title	ms.date	ms.assetid
Learn more about: Library Functions	Library Functions	11/04/2016	90c096ab-31df-479e-91d8-289900dc0bff

Library Functions

• NULL Macro

• Diagnostic Printed by the assert Function

• Character Testing

• Domain Errors

• Underflow of Floating-Point Values

• The fmod Function

• The signal Function

• Default Signals

• Terminating Newline Characters

• Blank Lines

• Null Characters

• File Position in Append Mode

• Truncation of Text Files

• File Buffering

• Zero-Length Files

• Filenames

• File Access Limits

• Deleting Open Files

• Renaming with a Name That Exists

• Reading Pointer Values

• Reading Ranges

• File Position Errors

• Messages Generated by the perror Function

• Allocating Zero Memory

• The abort Function

• The atexit Function

• Environment Names

• The system Function

• The strerror Function

• The Time Zone

• The clock Function

See also

Implementation-Defined Behavior